Green Bay Packers running back Eddie Lacy, who sustained a concussion during last week's game against Washington, may not play Sunday in Cincinnati. Tom Lynn/AP

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Green Bay Packers running back Eddie Lacy did not practice on Friday, an indication that he may not play against the Cincinnati Bengals on Sunday after sustaining a concussion last week against Washington.

The Packers have only two healthy running backs heading into Sundayís game: James Starks and rookie Johnathan Franklin.

Coach Mike McCarthy indicated earlier this week the Packers could use a tight end to serve in a fullback role, if necessary.

The Packers also could sign halfback Michael Hill off the practice squad for Sundayís game. To make room for Hill on the 53-man roster, the Packers would have to cut another player, with No. 8 offensive lineman Lane Taylor one of the most likely candidates.

The Packers practiced indoors in the Don Hutson Center, presumably due to overnight rain.